If any part of the articlle I linked to is usuful you have my full and complete permission to use or reprint ant part of it for your class The index of all about circuits Completed Projects forum has several different articles people may find useful.
Ihave had a stroke I am likely to be out of the scene for several years. I had planned on teaching a similar clas some time in the future.I wish you and your efforts well.
https://forum.allaboutcircuits.com/threads/completed-projects-index.63949/